Telegraph transmitter



June 20, 1944. o STEINER 2,352,031

TELEGRAPH TRANSMITTER Filed Aug. 8. 1941 FIG.1 57x7 ea 32 5s v IINVENTOR. v 33 02320 Steamer 'FIG..2A,, i

ATTORNEYS.

Patented June 20, 1944 TELEGRAPH TRANSltHTTER.

Otto Steiner, Berlin-Spandau, Germany; vested in the Alien PropertyCustodian Application August 8, 1941, Serial No. 405,985

ermany December 16, 1939 12 Claims. (01. 1 78-84) This invention relatesto printing telegraph apparatus and particularly to keyboard controlledsignal transmitting mechanism.

More specifically, the invention pertains to the transmission offacsimile telegraph signals.

' An object of the invention is to provide a key board controlledfacsimile telegraph signal trans mitter in which the finger keys may beoperated in overlap relation, any finger key being depressible beforethe transmission of the signal initiated by the previously depressedfinger key has been completed.

Another object of the invention is to provide a keyboard controlledfacsimile telegraph signal transmitter in which each finger key directlycontrolls a selectable signal transmitting element individual thereto.

In the operation of keyboard devices, it is desirable to aiford theoperator as much freedom with regard to the timingof successive fingerkey operations as possible. This enables operators whose normal speed ofoperation may vary widely or whose timing may be irregular to operatethe keyboard devices without special training or practice. When akeyboard transmitter device is so arranged and timed that a key levermay not be depressed until the transmission of the signal represented bya previously depressed key lever has been completed or substantiallycompleted an operator may be obliged to adopt a regular or rhythmictouch considerably at variance with that operators normal key leveroperating technique and such compulsion may be a source of annoyance tothe operator and possibly a source of errors in keyboard manipulation.This is particularly true if the system is designed to operate at arelatively low signaling frequency. The obligation to employ a rhythmickeyboard technique may be minimized by so arranging the keyboardtransmitter that as soon as the transmission of a signal combination hasbeen initiated so that it may proceed to conclusion without furthercontrol from the keyboard mechanism, a second key lever may be depressedand the selective condition controlled thereby stored so that at theconclusion of transmission of the previously initiated signalcombination, the transmission of the signal combination represented bythe stored selective condition will follow immediately. Thus thekeyboard mechanism is free to be operated during a large percentage ofeach interval allotted to the transmission of the signal combination andthe keyboard transmitter approaches, in freedom of operation, the wellknown typewriter.

According to the present invention each key lever is arranged to rockinto operated position a signal transmission controlling leverindividual to the key lever. The signal transmission controlling leverbecomes latched in operated position and the keyboard mechanism becomeslocked so that another key lever may not be immediately depressed. Thesignal transmission controlling lever withdraws one of two detents fromblocking relation to a transmitting contact lever which, however,remains held by a second detent. Each of the transmitting contact leversis normaly held by the two detents in position to hold an associatedtransmitting contact out of engagement with a transmitting drum. Thedrum is provided with circumferential rows of conductive' andnonconductive areas in alignment with each of the transmitting contacts.Upon engagement of one of the transmitting contacts with its associatedcircumferential row of conductive and nonconductive areas and rotationof the drum a succession'of signaling impulses will be generated inaccordance with the arrangement of conductive and nonconductive areasand the impulses will be impressed upon a communication channel to whichthe transmitter is connected. I i r The transmitting drum may be rotatedin startstop manner or continuously and the shaft by which it is rotatedis provided with a cam the first function of which is to release thesecond of the two detents holding the transmitting contact lever innormal position. Upon release of the second detent, the transmittingcontact lever permits the transmitting contact to engage thecircumferential alignment of conductive and nonconductive areas withwhich it is aligned at the proper point on the surfaceof the drumreg-ardless of whether the drum-has just been set in rotation or hasbeen rotating continuously to efiect the transmission of the combinationof impulses from beginning to end thereof. Immediately following the.release of the transmitting contact lever by retraction of the seconddetent, the cam performs its second function which is to unlock thekeyboard mechanism. The unlocking of the keyboard mechanism places it incondition for the depression of another key lever and a. key lever maybe depressed while the transmission of impulses of the preceding codecombination is in progress. If such key lever is depressed itsassociated signal transmission controlling lever will be rocked tooperated position and latched there and the keyboard mechanism willbecome locked and remain-locked until the timing cam again performs itstwo functions, namely, the unlocking of the transmitting contact leverto be selected which, it may be added, is accompanied by restoration ofthe previously selected transmitting contact lever, and unlocking thekeyboard mechanism to permit the operation of another key lever.

For a complete understanding of the invention, reference may be had tothe following detailed description to be interpreted in the light of theaccompanying drawing, wherein Fig. l is an elevational view partly insection showing the keyboard facsimile transmitter according to thepresent invention;

Fig. 2 is. an elevational view partly in section showing details of thekeyboard locking mechanism;

Fig. 2a is an enlarged detail of a portion of thestructure shown in Fig.2, certain of the partsbeing broken away to show the norm-a1 position oflocking bail pins in slots of a bail operating link;

'Fig. 3 is an elevational view partly in section showing the relation ofcertain elements when a key lever is depressed; and

Fig. 4 is a fragmentary perspective view supplementin the showing of thelocking mechanism in Fig. 2.

Referring now to Fig. 1 the reference numeral designates the supportingframe of the keyboard transmitter according to the invention. Acylindrical rod |2 extending across frame II from one side of thekeyboard transmitter to the other, and appearing at the right of Fig. 1,pivotally supports a plurality of key levers |3. Leaf springs I5 securedto the frame ll of keyboard transmitter engage the lower edges of thekey levers l3 and urge the key levers to their uppermost positions. isprovided at its foremost end with a finger key l4.

Intermediate the front and rear of the transmitter and extending fromside to side above the key levers i3 is a cylindrical rod l6 whichreceives the bifurcated upper ends of vertically disposed slides or pushbars I1. There are as many slides or push bars I! as there are keylevers l3 and eachslide l1 extends downwardly past its associated keylever H3 in close proximity thereto.

Each slide I1 is provided with a forwardly extending lug or projectionl8 and a laterally extending projection I9 of the key lever overlies thelug l8. A tension spring 2| is distended obliquely between each slide I!and a frame member 20 and urges the slides upwardly and in clockwisedirection as viewed in Fig. 1 so that their bifurcated portions rest aainst the bar l6 and their lower ends rest against a stationary bar 22se-- cu ed t the frame H of the transmitter.

, In addition to the key lever l3 the cylindrical rod l2 also pivotallysupports signal transmission controlling levers 23 of which there is onebeside each key lever l3. At, the foremost end (left-hand end as viewedin Fig. 1) each of the signal transmission controlling levers 23 isprovided with a projection or lug 24 which underlies a rearwardlyextending lug or projection 26 of the associated slide H. The signaltransmission controlling levers 23 are urged in clockwise direction tobring their, projections 24 into abutting relation with the projections23 of slides I! by leaf springs 21 secured to the frame ll of thetransmitter in the same manner as springs l5.

The slides are provided with notches, one on Each ofthe key levers I3ends by arms 33 pivoted at 34.

1) designated 28, and two on the rear edge designated 29 and 3|. All ofthe slides I! are identical so that when they are in their normalpositions resting against the cylindrical bar l6 all of the notches 28are aligned transversely of the transmitter, all of the notches 29 arealigned and all of the notches 3| are aligned.

The alignment of notches 28 is adapted to receive a lock bail 32extending across the entire. bank of slides l1 and supported at itsopposite Similarly, the alignment of notches 3| is adapted to receive alock bail 36 which extends across the bank of slides l1 and is supportedat its opposite ends by arms 31 pivoted'at 38. Lock bail 36 is providedwith a blade 39 extending obliquely upwardly toward the rear of thetransmitter from the rearmost edge of the lock bail 36 and the blade 39normally abuts the rearmost edge (right-hand edge as viewed in Figs. 1and 3) of a universal bail 4| which is in the form of a pivoted vaneextending across the bank of slides l1 and having its foremost edge,which is the left-hand edge as viewed in Figs. 1 and 3, disposed in thealignment of notches 29. Universal bail 4| is shown in Fig. 1 in itsnormal position and in Fig. 3 in its operated position and when it is inthe normal position it holds the lock bail 36 clear of the rear edges ofthe slides or push bars |1.

At least one of the arms 33 which supports the lock bail 32 is providedwith a laterally extending pin 42 (Figs. 2 and 4) and the adjacent oneof the arms 31 which supports lock bail 36 is provided with a laterallyextending pin 43. A tension spring 44 interconnects the pins 42 and 43so that look bail 32 is urged to the right as viewed in Figs. 1 and 2seeking to enter the alignment of notches 28 and the lock bail 36 isurged to the left seeking to enter the alignment of notches 3|.

The pins 42 and 43 carried by the lock bail supporting arms 33 and 31respectively, are disposed in elongated slots 46 and 4! respectively ina link 48. Link 48 extends to the rear of the transmitter (to the rightas viewed in Figs. 1 and 2) and is operable by a cam operated lever, aswill. presently appear, which normally holds link, 48 in its foremostposition (left-hand position as viewed in Figs. 1 and 2). Spring 44urges pin 42 toward the right-hand end of slot 46 and pin 43 toward theleft-hand end of slot 41. Pin 42 does in fact engage the right-hand endof slot 46 when link 48 is in its normal position and in this positionthe link 48 holds lock bail supporting arm 33 in position to hold lockbail 32 clear of the alignment of notches 28. Pin 43 does not normallyengage the left-hand end of slot 41 but is held toward the right of slot41, as shown in Fig. 2a, by universal bail 4| which holds lock bail 36clear of the alignment of notches 3|.

Upon the depression of any one of the key levers l3 its laterallyextending projection l9 engages the underlying projection I8 of theassociated slide I1 and depresses the slide, which movement causesspring 2| to become distended. As will be observed by reference to Figs.1, 2 and 3 the lower left-hand edges of the slides IT slope rightwardlyso that as the slide I1 is depressed it is also rocked counterclockwiseby engagement of the sloping portion of its left-hand edge with thestationary bar 22, and the counterclockwise rocking movement issufficient to cause projection l8 to move out from underlying relationwith the I laterally extending projection 9 of the key lever.

the front edge (left-hand edge as viewed in Fig.

Upon the escape of projection l 8 from projection l9 the slide I! is atonce restored by spring 2| to normal position.

Since the foremost edge of universal bar 4| is disposed in the alignmentof notches 29, the depression of one of the slides I! will causeuniversal bar 4| to be rocked counterclockwise thus withdrawingtherearmost edge of the universal bar from blocking relation to upwardlyextending blade 39 associated with lock bail 36. Thus, lock bail 36 isno longerheld free of the slides I! and it seeks to enter'the alignmentof notches 3|, the slot 4! accommodatingmovement of the pin 43 by spring44. Since at this time one of the slides I! is out of normal position,it will block out lock bail 36 from entering the notches 31 and willcontinue to block it out until the operated slide I! has been restoredto normal position by spring 2|, normal'position, lock bail 36 is nolonger blocked out of the notches 3| and under the influence of spring44 and the freedom afforded by slot 41 it enters the alignment ofnotches, thus locking against depression all of the slides I! whichthereby individually block operation of the key levers l3.

It will be apparent that when slide i1 is depressed to its lowermostposition by its associated key lever |3, the signal transmissioncontrolling lever 23 associated with the depressed slide I! will ,berocked into extreme counterclockwise position. ...Lock bail 36 isprovided with a depending flange 5| which is bent forwardly obliquely atits lower edge. Each signal transmission controlling lever 23 isprovided with an upwardly extending arm 52 the upper end of whichextends rearwardly obliquely toward the flange 5| of lock bail .36. Therelationship of arm 52 to flange 5| is such that the obliquely extendingportion of arm 52 will just clear the lower edge of flange 5| as lever23 is depressed. The apparatus may even be arranged so that when lever23 is rocked to extreme counterclockwise position its arm 52 will .camlock bail 36 slightly to the right as-viewed in Fig. 1, bail 36immediately returning to engagement with the edge of the depressed slideI! when arm 5?. of the operated lever 23 has been drawn clear of flange5|. Thus flange 5| will block the return path of arm- 52 of lever 23 andwhen lock bail 36 has entered the alignment of notches 3| the lower edgeof flange 5| will fully overlie the upper end of. arm. 52 of lever 23and will maintain lever 23 in operated position, which is itscounterclockwise .position.

Each of the signal transmission controlling levers E3 'is also providedwith an upstanding arm 53 the upper end of which isnormally presented tothe left and in blocking relation to oneof two projections at the lowerend of a transmitting contactlever 54 of'which there is one associatedwith each of the signal transmission controlling levers 23. Thetransmitting contact levers 54 are pivoted at 56 and each lever 54carries at its upper end an insulating cap 5'. which engages anindividual. transmitt ng contact spring 58. When the lever 54 is innormal position'it holds the contact spring 58 out of engagement with afacsimile signaltransmitt'ng drum 59. The transmitting drum 56 may besimilar to that shown in Patent 2.046.328 granted July 7, 1936, toEdward E. Kleinschmidt et al. Drum 59 may be rotatable continuously ormay be operable upon the start-stop principle, being released for onerevolution upon each operation a of a key lever l3 in well-known manner.

When the slide I! has returned to As previously mentioned each of thetransmitting contact control'levers 54 has two latching or detentprojections" at its lower end, one of which is normally blocked by theprojection 53 of the'associated signal transmission control lever 23.The other of the detent projections is normally engaged and blocked by abail 6| carried by arms 62 pivoted at 63. Shaft 64, to whichtransmitting drum 59 is fixed, has secured thereto a cam 66. Theperiphery of cam 66 is engaged by follower rollers 61 and 68 carried bycam follower levers 69 and 1|, respectively, pivoted at 12. Cam followerlever 1| pivotallyengages the rearmost end (right-hand end asviewed inFigs. 1 and 2) of the link 48 which engages, by means of slots 46 and41, the pins 42 and 43 respectively, carried by the lock bail arms 33and 31, respectively, all as previously described. Intermediate its endsthe link 48 is provided with an elongated slot 13 through which extendsa pin 14 carried by a link 16 which is pivotally connected to the camfollower lever 69. By virtue of slot I3 and pin 14 link 16 is supportedin the desired position and either of the links 48 and 16 may be movedindependently of the other.

One of the arms 62 which supports bail 6| has a sloping surface disposedin the path of pin l4, so that when link 16 is moved rightwardly asviewed in Fig. 1 pin 14 will engage the sloping surface of arm 62 andwill cam the arm in counterclockwise direction, thus withdrawing bail 6|from blocking relation to the transmitting contact levers 54. Upon thereturn of link 16 and its pin 14 bail 6| is permitted to return tonormal position as by springs (not shown). Link 16 supports atitsforemost end (left-hand end as viewed in Fig. 1) a restoring bail TIwhich engages all of the transmittingcontact levers 54 as link 16 ismoved to its operated position and holds them in position to be latchedby the pro 'jections 53 of the signal transmission control transmittingcontact lever 54, which remains held by bail 6|. Regardless of whetherthe transmitting cylinder 59 operates upon the start-stop principle, inwhich case the position of cam 66 may be taken as indicating the stopposition, or

whether the transmitting drum 59 rotates continuously, th secondary holdupon the selected transmitting contact lever 54; namely, that or bail6|, will not be released until cam 66 has operated follower lever 69. Asthe apex of cam approaches follower roller 61, the roller will be movedrightwardly as viewed in Fig. l and follower lever 69 will be rocked inclockwise direction. Pin 74 will be moved rightwardly and will cam bailarm 62 in counterclockwise direction thus withdrawing bail 6| fromblocking relation to all of the transmitting contact levers 54. However,restoring bail H is also moved rightwardly since it is carried by link76 which carries pin 14, so that the selected one of the transmittingcontact levers 54 and all others will be held by bail Tl, all except theselected one of the transmitting contact levers also being blockedagainst clockwise rotation by the projections 53 of unselected signaltransmission control levers 23.

As the apex of cam 66 passes roller 61, follower lever 69 is permittedto return to its normal or extreme counterclockwise position. Suchreturn is accompanied by movement of restoring bail shall not move intoblocking, relation to the transmitting contact levers 54 until therestoring bail H has returned toward its normal position a sumcientdistance to permit the selected one of the transmitting contact levers54 to escape from the bail 5| that is, for the selected one of thetransmitting contact levers 54 to have moved sufficiently in clockwisedirection that its secondary latching projection at the lower endthereof will have moved slightly to the left, as viewed in Fig. l, ofthe position in which bail 5| blocks the secondary projections of theunselected transmitting contact levers 54.- This operating requirementnecessitates that bail 6| shall not have returned to blocking relationto the transmitting contact levers 54 until restoring bail 11 shall havebeen drawn clear of the unselected levers 54. This'relationship may beestablished by properly selecting the distance that pin i4 shall travelbefore it engages the sloping portion of bail supporting arm 62 and theslope of the surface which pin 14 engages.

It will be apparent that since bail 6| does not move into blockingrelation to unselected ones of the transmitting contact levers 54 untilrestoring bail H has been drawn clear, the bail 6| will be drawn out ofblocking relation to the transmitting contact levers 54 before bailengages those levers during clockwise movement of cam follower lever 69by cam 66. The distance through which transmitting contact levers 54 ora selected one of them may move clockwise to engage rightwardly movingbail H at the instant that bail 6| is withdrawn should not be enough topermit the associated transmitting'contact 58 to come into vided in theperipheral portions which a transengagement with drum 59, unless thedrum is provided in the peripheral portions which a transmitting contact58 would engage at the time with non-signal transmitting areas, so thatno false signals will be applied to the communication channel.

As will be observed by reference to Fig. 1 the cam follower rollers 51and G8 are very close together and since both are operated by cam 96 theoperation of cam follower lever H will lag only slightly behind that ofcam follower lever 69. The cam follower lever H moves its link 48rightwardly as viewed in Fig. l to withdraw lock bail 35 clear of thealignment of notches 3| in slide i1, and to draw lock bail 32 into thealignment of notches 28 on the opposite sides of slide When cam followerlever ll has been rocked to extreme clockwiseposition by the apex of cam36, lock bail 38 has been retracted into position where its obliquelyextending blade 39 is blocked by universal bail 4|. The reason forlocking the slides I! by means of the lock bail 32 at the time that lockbail 36 is withdrawn is that the operation of cam follower lever 1|overlaps the operation of cam follower lever 69 and bail 6| mayuniversal bail 4|.

be out of blocking relation to the transmitting contact levers 54 at thetime that lock ball 36 is drawn free of slides If at this criticalinstant another of the key levers |3 should be operated its associatedtransmitting contact lever 54 would immediately be released by itssignal transmitting control lever 23 and permitted by restoring bail 11to move clear of the blocking position of bail 6| then in process ofreturning to normal position. Thus, two transmitting contacts might bepermitted to engage the drum 59 at the same time, resulting insuperposed unintelligible signals. The lock bail 32 is withdrawn fromthe alignment of notches 28 to unlock the keyboard mechanism for thenext operation upon the return of cam follower lever H and link 48 tonormal position, lock bail 36 being prevented from moving into lockingrelation to the slides I! by Slot 4'! in link 48 permits lock bail 36 toremain stationary while lock bail 32 is moved to normal position.

Upon the restoration of lock bail 36 to normal position its dependingflange 5| is drawn clear of the projection 52 of the selected signaltransmission control lever 23, which is prevented from returning to itsfull normal position, however, by its associated transmitting contactlever 54 which has been rocked clockwise by its transmitting contact 53and therefore interferes with the projection 53 of thesignaltransmission control lever 23 As soon as the lock ball 32 has beenmoved clear of the slides another key lever l3 may be operated toprepare for the transmission of the next signal combination. This willnot interfere in any way with the completion of the signal combinationwhich is then in process of transmission by virtue of engagement of oneof the transmitting contacts 58 with drum 59, as the only immediateeffect will be to depress another of the signal transmission controllevers 23'which will be held depressed by the bail 36, which will againlock the slides l1.

If the transmitting drum 59 is operable upon the start-stop principleand another key lever has been depressed, the drum will not be arrestedat the completion of a cycle but will continue to rotate for executionof the next cycle and the transmission of the signal combinationrepresenting the key lever depressed. If another key lever has not beendepressed, the drum 59 will be arrested at the completion of thetransmission of the signal combination for the last key lever depressed.If on the other hand the drum 59 rotates continuously, the cam 66 willagain operate the cam follower lever 69 whether or not a key lever hasbeen depressed. As the cam follower lever 69 is rocked to extremeclockwise position, bail 6| will be withdrawn from engagement with thebank of transmitting contact levers 54 and restoring bail 11 will bemoved rightwardly as viewed in Fig. 1 to restore that one of thetransmitting contact levers 54 corresponding to the signal combinationjust transmitted to normal position with its lower end to the right, asviewed in Fig. 1, of the projection 53 of the associated signaltransmission control lever 23. This permits that signal transmissioncontrol lever to return to normal position in blocking relation to ittransmitting contact lever 54 so that when bails BI and 11 return tonormal position the transmitting contact lever 54 will be held by thebail 6|.

Assuming, as previously mentioned, that another key lever had beendepressed while a signal combination was being transmitted, the

transmitting contact lever 54 associated with that key lever will escapefrom normal position before the return of bail 6| to normal position,due to the fact that its associated signal transmission control lever 23is held indepressed or perated position by the dependin flange of lockbail 36. Thus, the transmission of another signal combination will beinitiated. Immediately after the operation of cam follower 69, camfollower lever H will be operated to withdraw lock bail 36 andmomentarily lock the slides I! with bail 32, thereafter to removebail 32from looking relation to slides ll. In each cycle of transmitting drum59, cam follower levers 69 and II will be operated whether or not a keylever has been depressed. The effect of operation of cam follower lever69 if no key lever has been depressed will be merely to disengage bail6| from and reengage it with transmitting contact levers 54 and tooperate restoring bail Tl idly. The only eifect of operation of camfollower lever 7| will be to lock momentarily the slides I! by lock bail32, since lock bail 36 is held clear of slides H by universal bail ll.

Although reference has been made throughout the description to one cam66, one cam follower lever 69 and II, it will be understood that sincecam follower lever 69 operates bails 6| and 11, both of which extendacross the entire bank of transmitting contact levers, and since camfollower lever H operates lock bails 32 and 36 which extend across theentire bank of slides I1, it may be found desirable to provide .a cam 66and follower levers 69 and H, arm 62 for supporting bail 6| and links 48and 16 at each end of the transmitting drum 59 so that operating powerwill be applied uniformly at both ends of all of the balls.

Although a specific embodiment of the invention has been illustrated inthe drawing and described in the foregoing specification, it will beunderstood that the invention is not limited to such specific embodimentbut is capable of modification and rearrangement without departing fromthe spirit of the invention and within the scope of the appended claims.

What is claimed is:

1. In a telegraph transmitter, a movable signal sending mechanism, thekeyboard having keys biased to inoperative position, means for lockingsaid keyboard said means being biased to locking position, two separatemeans for holding said locking means in inoperative position, meansactuated by depressing a key for rendering one of said separate meansoperative and the other inoperative and means operable on release ofsaid key for rendering said one means inoperative, means operated bydepressing said key to initiate the movement of said signal sendingmechanism and means responsive to the initial movement of said mechanismto unlock the keyboard.

2. In a telegraph transmitter, a movable signal sending mechanism, thekeyboard having keys biased to inoperative position, means for lockingsaid keyboard said means being biased to looking position, two separatemeans for holding said locking means in inoperative position, meansactuated by depressing a key for rendering one of said separate meansoperative and the other inoperative and means operable on release ofsaid key for rendering said one means inoperative, means operated bydepressing said key to initiate the movement of said signal sendingmechanism, means responsive to the initial movement of said lever fornormally and primarily blocking its mechanism to unlock the keyboard,means for storing signal originating conditions, and means actuated by asecond key depressing for controlling the storing means.

' '3; in a telegraph transmitter, a plurality of key levers, a slideinengag'ement,with each key lever, a storage'lever operable'by each slide,abail for locking all of the slides following operation of one, a bailfor, holding the operatedstorage lever in operated position, atransmitting contact lever corresponding to each storage lever, aprojection carried by each storage lever for normally and primarilyblocking its contact lever, a bail for blocking secondarily anytransmitting contact lever which has beenunblocked by its storage lever,a transmitting contact controlled by each contact lever, a driventransmitting drum to be engaged by said contacts individually, a camdriven with said drum, a lever controlled by said cam for actuating saidblocking bail to release a primarily released contact lever and forsubsequently restoring said contact lever to primarily and'secondarilyblocked condition, and a lever also controlled by said cam forretracting said locklng bail to unlock said slides.

4. In a telegraph transmitter, a plurality of key levers, an escapablemember in engagement with and operable by each key lever, a storagelever operable by each escapable member before it escapes from the keylever, a bail for looking all of the escapable members followingescapement of the operated one, a bail for holding the operated storagelever in operated position, a transmitting contact lever correspondingto each storage lever, a projection carried by each storage contactlever, a bail for blocking secondarily any transmitting contact leverwhich has been unblocked by its storage lever, a transmitting contactcontrolled by each contact lever, a driven transmitting drum to beengaged by said contacts individually, a cam driven with said drum, alever controlled by said cam for actuating said blocking bail to releasea primarily released contact lever and for subsequently restoring saidcontact lever to primarily and secondarily blocked condition, and alever also controlled by said cam for retracting said locking bail tounlock said escapable members.

5. In a telegraph transmitter, a plurality of key levers, an escapablemember associated with and operable by each key lever, a storage elementoperable by each escapable member before it escapes from the key lever,a bail for locking all of the escapable members following escapement ofthe operated one, a bail for holding the operated storage element inoperated position, a transmitting contact lever corresponding to eachstorage element, said lever being formed with two projections, saidstorage element being adapted to engage one ofsaid projections fornormally and primarily blocking its contact lever, a bail for engagingsaid other projection for blocking secondarily any transmitting contactlever which has been unblocked by its storage element, a transmittingdrum to be engaged by said contacts individually, a cam driven with saiddrum, a levercontrolled by said cam for actuating said blocking bail torelease a primarily released contact lever and forsubsequently restoring'said' contact lever to primarily and secondarily blocked condition, anda lever also controlled by said cam for retracting said locking bail tounlock said escapable members.

6. In a telegraph transmitter, a plurality of key levers, an escapablemember associated with and operable by each key lever, a storage elementoperable by each escapable member before it escapes from the key lever,'a bail for locking all of the escapable members following escapement ofthe operated one, a bail associated with said locking bail for holdingthe operated storage element in operated position, a transmittingcontact lever corresponding to each storage element, each transmittingcontact lever having two projections, means associated with each storageelement to engage one of the projections for normally and primarilyblocking its contact lever, a bail engaging the other projection forblocking secondarily any transmitting contact lever which has beenunblocked by its storage element, a transmitting contact controlled byeach contact lever, a driven transmitting drum for'completing acommunication circuit through said contacts individually, a cam'drivenwith said drum, a lever controlled by said cam for actuating saidblocking bail to release a primarily released contact lever and forsubsequently restoring said contact lever to primarily and secondarilyblocked condition, and a lever also controlled by said cam forretracting said locking bail to unlock said escapable members.

7. In a telegraph transmitter, 'a plurality of key levers, an escapablemember in engagement with and operable by each key lever, a storageelement operable by each escapable member before it escapes from the keylever, means for locking all of the escapable membersfollowingescapement of the operated one, and for holding the operated storageelement in operated position, a transmitting contact lever correspondingto each storage element, means associated with each-storage element fornormally and primarily blocking its contact lever, a bail for blockingsecondarily said contact levers, a transmitting contact controlledbyeach contact lever, a driven transmitting drum for completing acommunication circuit through said contacts individually, a cam drivenwith said drum, a lever controlled by said cam for actuating saidblocking bail to release a primarily released contact lever, and forsubsequently restoring said contact lever to primarily and secondarilyblocked condition, and a lever also controlled by said cam forretracting said locking means to unlock said escapable member.

8. In a telegraph transmitter, a plurality of key levers, a storageelement operable under the control of each key lever, a bail for lockingthe key levers and for holding an operated storage element in operatedposition, a transmitting contact lever corresponding to each storageelement, means associated with said storage element for normally andprimarily blocking its contact lever, means for blocking secondarilysaid contact levers, a transmitting contact controlled by each contactlever, a drum having circumferential areas representing characterpatterns with a pattern individual to each transmitting contact, a camassociated with said drum, means actuated by said cam during the initialsignal transmitting movement for withdrawing the second mentionedblocking means to release a primarily released contact lever, and meansalso actuated by said cam for retracting said locking bail to unlocksaid key levers and to release said operated storage element.

9. In a telegraph transmitter, a plurality of key levers, a storageelement operable under the control of each key lever, means for lockingthe key levers and for holding an operated storage element in operatedposition, a transmitting contact controlling member corresponding toeach storage element, means associated with said storage element fornormally and primarily blocking its contact controlling member, meansfor blocking secondarily said contact controlling members, atransmitting contact controlled by each contact controlling member, adrum havingcircumferential areas representing character patterns with apattern individual to each transmitting contact, a cam associated withsaid drum, means actuated by said cam during the initial signaltransmitting movement for Withdrawing the second mentioned blockingmeans to release a primarily released contact controlling member, andmeans also actuated by said cam for retracting said locking means tounlock said key levers and to release said operated storage element.

10. In a telegraph transmitter, a plurality of selectively operablestorage elements, means for holding an operated storage element inoperated position, a transmitting contact controlling membercorresponding to each storage element and normally and primarily blockedthereby, means for blocking secondarily said contact controllingmembers, a transmitting contact controlled by each contact controllingmember, a rotatable member having alignments of areas representingcharacter patterns with a pattern individual to each transmittingcontact, a cam associated with said rotatable member, means actuatedbysaid cam for widthdrawing the second mentioned blocking means torelease a primarily rleased contact controlling member, and means alsoactuated by said cam for retracting said locking means to release saidoperated storage element.

11. In a telegraph transmitter, a plurality of selectively operablestorage elements, means for holding an operated storage element inoperated position, a transmitting contact controlling membercorresponding to each storage element and normally and primarily blockedthereby, means for blocking secondarily said contact controllingmembers, a transmitting contact controlled by each contact controllingmember, a rotatable member having patterns with a pattern individual toeach transmitting contact, means associated with said rotatable member,forwithdrawing the second mentioned blocking means to release aprimarily released contact controlling member, and for retracting saidlocking means to release said operated storage element.

12. In a telegraph transmitter, a plurality of key levers, a storageelement operable under control of each key lever, a bail for locking thekey levers and for holding an operated storage element in operatedposition, a drum having circumferential areas representing characterpatterns with a pattern individual to eachstorage element, atransmitting contact and contact'opcrating levers corresponding to eachstorage element, means biasing said lever to contact making position,means on said storage lever engaging said contact lever for normally andprimarily blocking its contact lever, operating meansfor actuating saiddrum, a second means engaging said contact lever for blockingsecondarily the same and means actuated by the individual. movement ofsaid operating means for withdrawing said second mentioned blockingmeans and retracting said bailtounlock the key levers.

, OTTO STEINER.

